Randomguy1 Posted March 11, 2019 Share Posted March 11, 2019 Hey guys! I found this fossil in east Kansas (Pennsylvanian) and thought it was a crinoid. However the shape is different looking. Do you think it’s a crinoid? Thank you! (The 2 parts belong together and yeah it’s pretty eroded) Link to comment Share on other sites More sharing options...
Kane Posted March 11, 2019 Share Posted March 11, 2019 Nice find. I’d say it is an orthocone nautiloid. 4 ...How to Philosophize with a Hammer Link to comment Share on other sites More sharing options...
ynot Posted March 11, 2019 Share Posted March 11, 2019 +1 for orthocone. 1 Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
Randomguy1 Posted March 11, 2019 Author Share Posted March 11, 2019 Here’s some more pics: Link to comment Share on other sites More sharing options...
Randomguy1 Posted March 11, 2019 Author Share Posted March 11, 2019 11 minutes ago, Kane said: Nice find. I’d say it is an orthocone nautiloid. 10 minutes ago, ynot said: +1 for orthocone. Thanks guys! That’s the first of its kind for me! Link to comment Share on other sites More sharing options...
Randomguy1 Posted March 11, 2019 Author Share Posted March 11, 2019 But seriously everyone on this forum is just amazing! Nothing but friendliness and helpfulness! Link to comment Share on other sites More sharing options...
Bguild Posted March 11, 2019 Share Posted March 11, 2019 Yep, looks to be a nice chunk o’ nautoloid. Nice find! 1 Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted March 12, 2019 Share Posted March 12, 2019 Very nice end of an orthoconic nautiloid. 1 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
BobWill Posted March 12, 2019 Share Posted March 12, 2019 I agree, and to help you tell the difference between the two I'll point out a few ways to make the distinction. It looks like you already noticed the tapering shape. Crinoid stems are generally the same diameter all along the length whereas an orthoconic nautiloid will taper at varying angles depending on which one it is. You also can often see the crinulations between the sections of a stem if not on the ends, both absent on yours. When the ends are well preserved like one of yours is you can often see a septum, concave on one end and convex on the other. Sometimes you can also see evidence of the siphuncle near the center. 1 Link to comment Share on other sites More sharing options...
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